نتایج جستجو برای: walled section
تعداد نتایج: 171928 فیلتر نتایج به سال:
In order to calculate the equivalent torsional-warping stiffness of Reinforced Concrete (RC) cores that have thin-walled open cross-section, a new analytical methodology, which combines Vlasov torsion theory with Bernoulli bending theory, is presented herein. As basis calculations, we use principal elastic reference system core from this consider known. Furthermore, start point core's exact sec...
Background and aim: In this study the cytotoxicity to human epithelial lung cells of single-walled carbon nanotubes, multi-walled carbon nanotubes and chrysotile was compared based on the following cytotoxicity indices: no observable adverse effect concentration (NOAEC), inhibitory concentration 50 (IC50), and Total Lethal Concentration (TLC). Materials and Methods: Human epithelial lung cells...
In this study we compare the biodegradation of both single-walled (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) using two different oxidative conditions. In particular, we demonstrate that oxidized multi-walled carbon nanotubes are highly degraded, although not to completeness when treated with horseradish peroxidase (HRP) in the presence of hydrogen peroxide.
In this study, we investigated the internal structure of ’as-grown’ vertically aligned single-walled carbon nanotube (VA-SWNT) films by cross-sectional transmission electron microscopy (TEM). The VA-SWNTs were produced by the alcohol catalytic CVD method [1, 2], and transferred onto a TEM grid using a hot water technique [3]. The resulting freestanding VA-SWNT film was observed along the alignm...
The discovery of carbon nanotubes and C60 fullerenes has created an enormous impact on possible new nanomechanical devices. Owing to their unique mechanical and electronic properties, such as low weight, high strength, flexibility and thermal stability, carbon nanotubes andC60 fullerenes are of considerable interest to researchers frommany scientific areas. One aspect that has attracted much at...
We aimed to compare the CT findings of nontuberculous mycobacterial pulmonary diseases caused by Mycobacterium avium-intracellulare complex (MAC) and Mycobacterium abscessus. Two chest radiologists analyzed retrospectively the thin-section CT findings of 51 patients with MAC and 36 with M. abscessus infection in terms of patterns and forms of lung lesions. No significant difference was found be...
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